Description
Key Technical Specifications
| Parameter | Value |
| Manufacturer | GE Fanuc / Emerson |
| Part Number | IC693PWR331C |
| Revision | Revision C (Improved thermal stability & overvoltage protection) |
| Series | Series 90-30 |
| Module Type | High-Capacity 24 V DC Baseplate Power Supply |
| Input Voltage Range | 18 to 30 V DC (Nominal 24 V DC) |
| Total Output Power | 30 Watts |
| 5 V DC Output Capacity | 30 A maximum (supplies power to CPU, high-density I/O, and option cards) |
| 24 V DC Relay Output Capacity | 0.8 A maximum (supplies internal relay coils) |
| 24 V DC Isolated Output | 0.8 A maximum (supplies field transmitters/sensors) |
| Inrush Current | 4 A peak for 20 ms maximum |
| Holdup Time | 14 ms minimum at 24 V DC full load |
| Battery Support | Holds 3 V DC Lithium RAM Backup Battery (IC693ACC301) |
| Mounting Position | Leftmost dedicated power supply slot of any Series 90-30 Baseplate |
Product Introduction & Supply Chain Strategy
The GE Fanuc IC693PWR331C is a 30 Watt high-capacity 24 V DC power supply module engineered for Series 90-30 PLCs. Designed for DC-powered control cabinets, marine/offshore installations, and mobile equipment, it converts 18–30 V DC input power into precise backplane logic power (+5 V DC at up to 30 A) and auxiliary loop/relay power (+24 V DC).
Securing the IC693PWR331C as New Surplus is a critical supply-chain safeguard for facilities operating Series 90-30 systems on 24 V DC plant power. Sourcing factory-fresh, uninstalled original inventory eliminates the high risks of electrolytic capacitor drying, voltage ripple instability, and thermal stress degradation common in second-hand power modules, guaranteeing clean logic power without expensive platform overhauls.
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Execute Lock-Out/Tag-Out (LOTO) procedures on the 24 V DC main supply source feeding the PLC enclosure.
- Verify that line supply voltage falls within 18–30 V DC before wiring the input terminal strip.
- Inspect and install a fresh 3 V DC RAM backup battery (IC693ACC301) in the front battery compartment if replacing a main CPU rack power supply.
Stage 2: Removal
- De-energize primary 24 V DC input power to the rack. Unclip the protective terminal cover and disconnect incoming wires (+24V, Return, Chassis Ground).
- Squeeze the module release levers at the top and bottom of the IC693PWR331C housing.
- Slide the power supply straight forward out of the leftmost baseplate slot.
Stage 3: Installation (Seat & Wire)
- Align the rear card edge of the replacement IC693PWR331C with the leftmost slot guide rails of the Series 90-30 baseplate.
- Press firmly on the top and bottom face of the module until both retaining latches click locked.
- Reattach incoming power leads (+24V, Return, Ground) to the front screw terminals and secure the protective clear cover flap.
Stage 4: Power-On & Testing
- Reapply 24 V DC power to the terminal block.
- Observe front panel LED indicators: verify that the “PWR” (Power) LED lights solid green, and “OK” / “RUN” status indicators show normal startup.
- Check 5 V DC and 24 V DC voltage levels across baseplate test points to confirm stable power regulation under full module load.

IC693PWR331C

IC693PWR331C
Firmware/Software Versions & Upgrade Notes
- Software Configuration: The IC693PWR331C is a passive hardware power supply and requires no software or firmware configuration in Proficy Machine Edition or Logicmaster 90.
- Revision C Enhancements: Revision C includes upgraded surge filtering and improved heat dissipation over earlier revisions (e.g., PWR331A / PWR331B), offering higher noise immunity in harsh industrial electrical environments.
- Slot Compatibility: Mounts exclusively in the dedicated leftmost slot (marked “PWR”) on all IC693 Main, Expansion, and Remote Baseplates.
Frequently Asked Questions (FAQ)
Is this power supply brand new or pulled from a used rack?
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned panel, and not refurbished. All power supplies undergo full quality verification to ensure OEM-level reliability.
What is the main operational difference between the IC693PWR321 and the ?
The IC693PWR321 requires 120/240 V AC or 125 V DC input power and delivers up to 15 A at +5 V DC backplane power. The accepts 24 V DC input power and provides a high-capacity +5 V DC output up to 30 A for heavy backplane load requirements.
Why is buying New Surplus especially important for PLC power supplies like the ?
Power supplies contain electrolytic capacitors that degrade over time, especially when exposed to continuous heat in used industrial panels. Dried-out capacitors cause high output ripple voltage, causing random CPU faults and intermittent I/O card resets. Buying New Surplus guarantees fresh internal capacitors and 100% operational life.
Can the be used in expansion racks?
Yes. It can be installed in the leftmost slot of any Series 90-30 baseplate (CPU Main Baseplate, Expansion Baseplate, or Remote I/O Baseplate) operating on a 24 V DC supply system.
Does the supply battery power to retain CPU memory during outages?
Yes. The houses the 3 V DC lithium battery connector that maintains volatile RAM memory in Series 90-30 CPUs when primary power is removed.
What warranty coverage is included with this New Surplus power supply?
This power supply module includes a full 1-year functional warranty. If any operational defect or hardware failure occurs during normal use within 12 months, we will immediately supply a replacement unit from our active buffer inventory.

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